1. The average of 25 observations is 13. It was later found that an observation 73 was wrongly entered as 48. The new average is
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By: anil on 05 May 2019 02.01 am
it is given that average of 25 observation = 13 Average = $$frac{SumofObservation}{NumberofObservation}$$ 13 = $$frac{Sum}{25}$$ Sum = 325 it is given that 73 is entered as 48 and hence new and corrected sum = 325 - 48 + 73 = 350 New and corrected average = $$frac{350}{25}$$ = 14
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